| 摘要 |
PURPOSE:To obtain an electrophotographic receptor high in sensitivity and durability, by using a specified disazo pigment especially for a charge generating layer. CONSTITUTION:A disazo pigment represented by formula 1 is contained especially in a charge generating layer to form a laminate photoconductive layer on a conductive substrate, thus permitting the obtained photoreceotor to be high in sensitivity and durability and able to form a copy identical to an original. In formulaI, A is a hydrocarbon group having a double bond either single or conjugated, or a heterocyclic group which may be condensed with or sibstituted by a hydrocarbon group or an aromatic ring which contains N in the conjugated double bonds as shown by the formulae 2-7; R2, R3 are H, halogen, lower alkyl or alkoxy, or NO2; R4 is H, halogen, or CN; and X is a residue forming a naphthalene, anthracene, carbazole, benzocarbazole, or benzofuran ring by condensing with a benzene ring, and it may be substituted by a group except OH and CONHR1. |
